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Factor out a GcStore interface

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Starts progress on #5729.

The idea is that we should not have these default methods throwing
"unimplemented". This is a small step in that direction.

I kept `addTempRoot` because it is a no-op, rather than failure. Also,
as a practical matter, it is called all over the place, while doing
other tasks, so the downcasting would be annoying.

Maybe in the future I could move the "real" `addTempRoot` to `GcStore`,
and the existing usecases use a `tryAddTempRoot` wrapper to downcast or
do nothing, but I wasn't sure whether that was a good idea so with a
bias to less churn I didn't do it yet.
This commit is contained in:
John Ericson 2022-03-01 18:31:36 +00:00
parent 391f4fcabe
commit 6636202356
16 changed files with 143 additions and 93 deletions
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12
src/libstore/daemon.cc
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@ -3,6 +3,7 @@
#include "worker-protocol.hh"
#include "build-result.hh"
#include "store-api.hh"
#include "gc-store.hh"
#include "path-with-outputs.hh"
#include "finally.hh"
#include "archive.hh"
@ -623,9 +624,12 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
case wopAddIndirectRoot: {
Path path = absPath(readString(from));
logger->startWork();
store->addIndirectRoot(path);
auto & gcStore = requireGcStore(*store);
gcStore.addIndirectRoot(path);
logger->stopWork();
to << 1;
break;
}
@ -640,7 +644,8 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
case wopFindRoots: {
logger->startWork();
Roots roots = store->findRoots(!trusted);
auto & gcStore = requireGcStore(*store);
Roots roots = gcStore.findRoots(!trusted);
logger->stopWork();
size_t size = 0;
@ -671,7 +676,8 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
logger->startWork();
if (options.ignoreLiveness)
throw Error("you are not allowed to ignore liveness");
store->collectGarbage(options, results);
auto & gcStore = requireGcStore(*store);
gcStore.collectGarbage(options, results);
logger->stopWork();
to << results.paths << results.bytesFreed << 0 /* obsolete */;